Lenny at first, with an update to Squeeze as a possibility. Last time I used Squeeze on machines this old I had boot problems. And the time it takes to make the update can be very frustrating, if it just ends in problems.😉

I know I’m a bit off topic, but I’d like an advise. A friend of mine is trying to setup an old Pentium II for his little daughter to start knowing internet. So a basic distro with a graphic environment with a browser and a mail is far enough.
Any recommendations here?

I’m a bit hardcore and suggested him debian lenny cli only…he got a bit angry about that but I told him this way his daughter at age of 15 (she’s 6 now) is going to be a great hacker :-))